CN102313229B - Dipped beam optical system for car headlamp based on light emitting diode (LED) light source - Google Patents
Dipped beam optical system for car headlamp based on light emitting diode (LED) light source Download PDFInfo
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- CN102313229B CN102313229B CN 201110204067 CN201110204067A CN102313229B CN 102313229 B CN102313229 B CN 102313229B CN 201110204067 CN201110204067 CN 201110204067 CN 201110204067 A CN201110204067 A CN 201110204067A CN 102313229 B CN102313229 B CN 102313229B
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- led array
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- 230000003287 optical effect Effects 0.000 title claims abstract description 23
- 238000005286 illumination Methods 0.000 abstract description 3
- 238000003491 array Methods 0.000 abstract 2
- 229910052736 halogen Inorganic materials 0.000 description 5
- 150000002367 halogens Chemical class 0.000 description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- 239000010937 tungsten Substances 0.000 description 5
- 229910052721 tungsten Inorganic materials 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention relates to a dipped beam optical system for a car headlamp based on a light emitting diode (LED) light source, which consists of two groups of white LED arrays containing reflectors and serving as the light source, two right-angle prisms and an aspherical mirror and is characterized in that the aspherical mirror is placed in front of the two right-angle prisms and the positions of the two LED arrays and the prisms are adjusted so that upper edges of bevel edge planes of the right-angle prisms are located at or close to a focal plane of the aspherical mirror. The LED headlamp dipped beam optical system adopting the optical system can emit illumination beams which meet relative headlamp dipped beam standards at home and abroad and with which a motor vehicle driver can see road conditions clearly.
Description
Technical field
The invention belongs to optical technical field, be specifically related to that a kind of what provide road lighting to automobile driver is the dipped beam optical system of the car headlamp of light source based on LED.
Technical background
The dim head lights system that the current mobility car uses can provide road lighting as automobile driver.According to domestic and international headlamp standard, the dipped beam system should cause under the situation of dazzle the road opposite driver that sends a car avoiding, provide the road lighting of enough horizontal widths to illuminate adjacent lane, and can throw light on simultaneously the track at a distance, judge that to the driver road surface situation provides convenience.The car light standard GB4599-94 " car headlamp is joined performance " that China adopts is the relevant laws and regulations " E/ECE/324 Addendum 1:Regulations No.1 and No.2 " with reference to Economic Commission for Europe.According to the GB standard, automotive headlight dipped beam system need be in car light the place ahead 25 meters form a horizontal extension and reach 7920mm, extends perpendicular reaches the rectangular light spot of 1250mm; Simultaneously, at the right half part of hot spot, superposeed from the horizontal by 15 ° rectangular light spot on the rectangular light spot basis.The upper edge of whole hot spot will form a dead line clearly in test screen, i.e. the left-half level of dead line, and right half part is from the horizontal by 15 °; Simultaneously, should there be a suitable clear zone below, the turning point of dead line as focus.
Existing car headlamp dipped beam system mainly with halogen tungsten lamp and xenon lamp as light source, the optical system that adopts comprises quadratic surface reflector-baffle plate-lens combination and free-form surface reflector, there are the following problems: 1. use halogen tungsten lamp as light source, want to produce the illumination that meets the demands, its power requirement is very high, and the employed halogen tungsten lamp of car light has strict light source standard and classification, thereby the application cost of system is very high; 2. head lamp system need be at the long-play at night, and the life-span of halogen tungsten lamp is shorter relatively, thereby needs often frequently more to change the bulb, and maintenance cost is also higher; 3. no matter be to adopt quadratic surface reflector-baffle plate-lens combination or employing free-form surface reflector, the light of light source outgoing has quite a few by baffle plate or aluminium sunshade retaining and absorbs, and whole optical system efficiency is very limited; 4. the hot spot dead line that adopts free-form surface reflector to realize is clear inadequately usually, has the hot spot burr.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide a kind of is the dipped beam optical system of the car headlamp of light source based on LED, be to use white light LED array replacement halogen tungsten lamp and xenon lamp as light source, the hot spot that system is sent meet the demands by optical design, and improve it to the utilization rate of luminous energy.
Technical scheme of the present invention realizes in the following manner: be the dipped beam optical system of the car headlamp of light source based on LED, by two groups of white light LED array that contain reflector as light source, two right-angle prisms and an aspherical mirror are formed; It is characterized in that: before described aspherical mirror is positioned over two right-angle prisms, adjust the position of two led array and prism, make the upper edge on right-angle prism hypotenuse plane be positioned at aspherical mirror the place, focal plane or near, the convex surface of this aspherical mirror outwardly, face shape is as being tire tread.
Described two groups of white light LED array, one group of horizontal positioned after collimating, optical axis straight up, another group led array constitutes 15 ° of inclination angles with horizontal direction in the perpendicular at original place behind collimation; Described two right-angle prisms are arranged at respectively on two groups of white light LED array, and the plane, hypotenuse place of each piece right-angle prism is at 45 with each self-corresponding white light LED array respectively.
Described two groups of white light LED array, penetrate the back and form an asymmetric light beam: at 25m at a distance, left-half is a rectangular light spot, and the horizontal extension of hot spot reaches 3960mm, and extends perpendicular reaches 1250mm; Right half part be on the rectangular light spot basis stack one from the horizontal by 15 ° rectangular light spot bar; At 25m at a distance, whole hot spot horizontal extension reaches 7920mm, and extends perpendicular reaches 1250mm, and there is dead line clearly at the hot spot edge; The relative left-half of the right half part of hot spot has superposeed from the horizontal by 15 ° rectangular light spot in the hot spot upper edge; The intersection of two parts hot spot upper edge has formed a hot spot focus simultaneously.
The present invention has following characteristics: 1. use LED as light source, reduce system energy consumption, prolong lifetime of system; 2. utilize the luminous characteristics of LED single face, by using optical prism, form dead line clearly, change original method of using baffle plate, avoided the absorption of light, improved overall system efficiency; 3. utilize the flexibility of LED packaged type, the chip distribution of appropriate design led array and whole array arrangement structure can relatively easily form the 15 ° of dead lines in right side; 4. can to make based on LED be the dipped beam optical system of the car headlamp of light source to optical system of the present invention, can send and satisfy the illuminating bundle of relevant dim head lights standard both at home and abroad fully, in time sees pavement behavior clearly to help the motor vehicle driving person; 5. low, the long service life of luminous efficiency height, system energy consumption, the good and good reliability of light shape, and meet the dipped beam optical system based on the car headlamp of led light source of car headlamp lighting criteria requirement.
Description of drawings
Fig. 1 is front view of the present invention.
Fig. 2 is right view of the present invention.
Number in the figure:
1 be horizontal positioned white light LED array, 2 for horizontal direction tilt 15 ° of placements white light LED array, 3 for corresponding to the right-angle prism of the white light LED array of horizontal positioned,
4 be corresponding to horizontal direction tilt 15 ° of placements white light LED array right-angle prism,
5 is aspherical mirror.
The specific embodiment
Be the dipped beam optical system of the car headlamp of light source based on LED, by two groups of white light LED array that contain reflector as light source, two right-angle prisms and an aspherical mirror are formed.
Known by Fig. 1, Fig. 2: 1. system adopts encapsulation to arrange identical two groups of white light LED array as light source; White light LED array 1 is formed by some white light LEDs that have a reflector, by the effect of this reflector, makes the light beam of outgoing all close to directional light;
2. will be through one group led array horizontal positioned behind the collimation, optical axis straight up, another group led array 2 constitutes 15 ° of inclination angles with horizontal direction in the perpendicular at original place behind collimation.At two groups of led array corresponding right-angle prisms 3,4 of placing respectively, the inclined-plane of each right-angle prism respectively with corresponding led array angle at 45;
3. the complete light source modules that constitute of two groups of led array, formation one collimated light beam of the light that sends after the right-angle prism reflection, the light beam left-half is approximately an even rectangular light spot, and right half part is a rectangular light spot from the horizontal by 15 ° of inclination angles; The upper edge of whole hot spot has formed same clear dead line, and namely the left-half dead line is level, and the dead line of right half part is from the horizontal by 15 ° of inclination angles.There is a suitable clear zone below, turning point of dead line.
4. before right-angle prism, place an aspherical mirror 5, the convex surface of this aspherical mirror 5 outwardly, face shape is as be tire tread, makes that having satisfied the light beam that light shape requires can launch with vertical direction in the horizontal direction, expansion reaches the requirement of the domestic and international standard of being correlated with.
6, adjust the position of two led array and right-angle prism, make the rib of upper edge, right-angle prism inclined-plane be positioned near the focal plane of aspherical mirror D; And aspherical mirror is also as projection objective, requires to throw away according to horizontal extension and extends perpendicular and the clear zone below the dead line turning point with satisfying collimated light beam that light shape requires.
7, behind aspherical mirror, can outgoing satisfy the light beam of domestic and international standard, namely form an asymmetric light beam: at 25m photometric screen place, left-half is a rectangular light spot, and the horizontal extension of hot spot reaches 3960mm, and extends perpendicular reaches 1250mm; Right half part be on the rectangular light spot basis stack one from the horizontal by 15 ° rectangular light spot bar; Whole hot spot horizontal extension reaches 7920mm, and extends perpendicular reaches 1250mm, and there is dead line clearly at the hot spot edge; The right half part of hot spot is compared left-half, has superposeed from the horizontal by 15 ° rectangular light spot in the hot spot upper edge; The intersection of two parts hot spot upper edge has formed a hot spot focus simultaneously.Should satisfy related request in 25m hot spot Illumination Distribution at a distance.
Described two groups of white light LED array, outgoing after reflector alignment, horizontal outgoing after the right-angle prism reflection again, effect by aspherical mirror, the light beam of international standard is satisfied in final outgoing, namely forms an asymmetric light beam: at 25m at a distance, left-half is a rectangular light spot, the horizontal extension of hot spot reaches 3960mm, and extends perpendicular reaches 1250mm; Right half part be on the rectangular light spot basis stack one from the horizontal by 15 ° rectangular light spot bar; At 25m at a distance, whole hot spot horizontal extension reaches 7920mm, and extends perpendicular reaches 1250mm, and there is dead line clearly at the hot spot edge; The right half part of hot spot is compared left-half, has superposeed from the horizontal by 15 ° rectangular light spot in the hot spot upper edge; The intersection of two parts hot spot upper edge has formed a hot spot focus simultaneously.
Claims (3)
1. be the dipped beam optical system of the car headlamp of light source based on LED, by two groups of white light LED array that contain reflector as light source, two right-angle prisms and an aspherical mirror are formed; One group be horizontal positioned white light LED array (1), another group for the tilt white light LED array (2) of 15 ° of placements of horizontal direction; Described two groups of white light LED array, one group of horizontal positioned after collimating, optical axis is straight up; Described two right-angle prisms are arranged at respectively on two groups of white light LED array, and the plane, hypotenuse place of each piece right-angle prism is at 45 with each self-corresponding white light LED array respectively; It is characterized in that: before described aspherical mirror is positioned over two right-angle prisms, adjust the position of two led array and prism, make the upper edge on right-angle prism hypotenuse plane be positioned at aspherical mirror the place, focal plane or near.
2. according to claim 1 is the dipped beam optical system of the car headlamp of light source based on LED, it is characterized in that: the convex surface of described aspherical mirror outwardly, face shape is tire tread.
3. according to claim 1 is the dipped beam optical system of the car headlamp of light source based on LED, it is characterized in that: described two groups of white light LED array, penetrate the back and form an asymmetric light beam: at 25m at a distance, left-half is a rectangular light spot, the horizontal extension of hot spot reaches 3960mm, and extends perpendicular reaches 1250mm; Right half part be on the rectangular light spot basis stack one from the horizontal by 15 ° rectangular light spot bar; At 25m at a distance, whole hot spot horizontal extension reaches 7920mm, and extends perpendicular reaches 1250mm, and there is dead line clearly at the hot spot edge; The relative left-half of the right half part of hot spot has superposeed from the horizontal by 15 ° rectangular light spot in the hot spot upper edge; The intersection of two parts hot spot upper edge has formed a hot spot focus simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110204067 CN102313229B (en) | 2011-07-21 | 2011-07-21 | Dipped beam optical system for car headlamp based on light emitting diode (LED) light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110204067 CN102313229B (en) | 2011-07-21 | 2011-07-21 | Dipped beam optical system for car headlamp based on light emitting diode (LED) light source |
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| Publication Number | Publication Date |
|---|---|
| CN102313229A CN102313229A (en) | 2012-01-11 |
| CN102313229B true CN102313229B (en) | 2013-08-07 |
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| CN 201110204067 Expired - Fee Related CN102313229B (en) | 2011-07-21 | 2011-07-21 | Dipped beam optical system for car headlamp based on light emitting diode (LED) light source |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9308858B2 (en) * | 2012-07-13 | 2016-04-12 | Lg Innotek Co., Ltd. | Lamp unit and lighting system for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4068387B2 (en) * | 2002-04-23 | 2008-03-26 | 株式会社小糸製作所 | Light source unit |
| JP2004311101A (en) * | 2003-04-03 | 2004-11-04 | Koito Mfg Co Ltd | Vehicle head lamp and semiconductor light emitting element |
| JP4314911B2 (en) * | 2003-08-20 | 2009-08-19 | スタンレー電気株式会社 | Vehicle headlamp |
| JP4053489B2 (en) * | 2003-11-04 | 2008-02-27 | 株式会社小糸製作所 | Vehicle headlamp |
| FR2898661B1 (en) * | 2006-03-17 | 2009-10-23 | Valeo Vision Sa | INFRARED TRANSMITTER PROJECTOR LIGHTING MODULE FOR MOTOR VEHICLE AND PROJECTOR EQUIPPED WITH SUCH A MODULE |
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Granted publication date: 20130807 |